6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-07-25 13:24:46 +00:00
Code Issues Projects Releases Wiki Activity

Recommit this, looks like it wasn't the cause.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95165 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher
2010-02-03 00:21:58 +00:00
parent 90567c3560
commit 0c6a8f9eda
4 changed files with 141 additions and 69 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
lib/Transforms/Scalar/SimplifyLibCalls.cpp
View File

@@ -1213,8 +1213,13 @@ struct StrCpyChkOpt : public LibCallOptimization {
if (!SizeCI)
return 0;
// We don't have any length information, just lower to a plain strcpy.
if (SizeCI->isAllOnesValue())
// If a) we don't have any length information, or b) we know this will
// fit then just lower to a plain strcpy. Otherwise we'll keep our
// strcpy_chk call which may fail at runtime if the size is too long.
// TODO: It might be nice to get a maximum length out of the possible
// string lengths for varying.
if (SizeCI->isAllOnesValue() ||
SizeCI->getZExtValue() >= GetStringLength(CI->getOperand(2)))
return EmitStrCpy(CI->getOperand(1), CI->getOperand(2), B);
return 0;